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A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?
Yang, Taozhi1,2; Esamdin, A.1,2; Song, Fangfang1,2; Niu, Hubiao1; Feng, Guojie1; Zong, Peng1,2; Zeng, Xiangyun1,2; Liu, Junhui1,2; Liu, Jinzhong1; Ma, Lu1; Zhao, Fei1
2018-08-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume863Issue:2Pages:10
Contribution Rank1
Abstract

In this paper, the high-precision light curves of the Kepler target KIC 5950759 are analyzed. The Fourier analysis of the long cadence (LC) light curve reveals three independent frequencies. Two of them are main pulsation modes: F0 = 14.221373(21) d(-1) and F1 = 18.337249(44) d(-1). The third independent frequency, f(m) = 0.3193 d(-1), is found in LC data with a signal-to-noise ratio of 6.2. A weak modulation of fm to F0 and F1 modes (triplet structures centered on F0 and F1) are detected both in long and short cadence data. This is the first detection of the modulation effect in a double-mode high-amplitude delta Scuti (HADS) star. The most possible cause of the modulation effect in the light curves is amplitude modulation with the star's rotation frequency of 0.3193 d(-1). The preliminary analysis suggests that KIC 5950759 is in the bottom of the HADS instability strip and likely situated in the main sequence. Spectroscopic observations are necessary to verify the true nature of the modulation terms.

KeywordStars: Oscillations Stars: Variables: Delta Scuti
DOI10.3847/1538-4357/aad241
Indexed BySCI
Language英语
WOS KeywordDelta-scuti Stars ; Pulsating Stars ; Variable-stars ; Petersen Diagrams ; Hads Star ; Rr Lyrae ; Asteroseismology ; Photometry ; Mission ; Space
Funding Projectprogram of the light in China's Western Region (LCWR)[XBBS-2014-25] ; program of the light in China's Western Region (LCWR)[2015-XBQN-A-02] ; National Natural Science Foundation of China[11273051] ; National Natural Science Foundation of China[11661161016] ; 13th Five-year Informatization Plan of Chinese Academy of Sciences[XXH13503-03-107] ; Youth Innovation Promotion Association CAS[2014050] ; Youth Innovation Promotion Association CAS[2018080] ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23040100]
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000442628400031
PublisherIOP PUBLISHING LTD
Funding Organizationprogram of the light in China's Western Region (LCWR) ; National Natural Science Foundation of China ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/2143
Collection光学天文与技术应用研究室
Corresponding AuthorYang, Taozhi
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang, Taozhi,Esamdin, A.,Song, Fangfang,et al. A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?[J]. ASTROPHYSICAL JOURNAL,2018,863(2):10.
APA Yang, Taozhi.,Esamdin, A..,Song, Fangfang.,Niu, Hubiao.,Feng, Guojie.,...&Zhao, Fei.(2018).A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?.ASTROPHYSICAL JOURNAL,863(2),10.
MLA Yang, Taozhi,et al."A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?".ASTROPHYSICAL JOURNAL 863.2(2018):10.
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